Crankless mechanism



June l3, 1933.

T. L. SHERMAN CRANKLESS MECHANISM Filed April 20, 1931.

INVENTOR mama; L 56am 4/;

Patented June 13, 1933 UNITED S:

PA ENT OFFIC THOMAS I. 81mm, or canton; mssacnusnrrs, hssrenon 'ro melanin-:1 cmnxnnss ENQINESCORPORATION, or, NEWYORK; 1v. Y.,j A coaroiwrron or new 1 Application filed A pril20,

invention relates to crankless mechplates for such mechanisms. i y

Crankless mechanisms of the type 1n connection with which this invention has been developed comprise a shaft having a slant connected thereto and pistons coacting with anisms and particularly to slants or swash the slantand adapted to impart rotation 1 theirouter dead center positions. When this a condition exists the portions of the slantengaging the pistons so located are disposed at their most acute angles with-reference to the shaft 'axisi. The greatestload imposed on the slant is thus imposedon theiportions of the slant making the most acute angles with theaxis. I

It has -beenproposed in the past to belt a slant ringto aflange on a hub carried; by the shaft. .butsuch structures have been opento the objection that too. great a tension stress has been placedxon the bolts. For

instance, if the shaft is provided with a flange. and a slant ring isbolted tovthe flangeat one directionmust be taken by: thebolts.

Thisinvention has for its salient object to provide a slant and shaft so relatively constructed and arranged that the greatest thrust loads imparted to the slantwillnot 5 be taken by the bolts or other connectin means between the shaft and slant.

Further objects ofthe invention will apf pear from the following specification taken a part of this application, and in which i Fig. 1 is a sectional elevation of a slant shaft and slant constructed in accordance with the invention; r

h Fig. 2 is an elevational view at right angles to Fig. 1, showing diagrammatically the relations of the cylinders to the slant;

2 Fig. 3 is a sectional elevation of the slant r Fig. 4 is an elevational View taken at right angles to Fig. 3; and

pear from the following description.

side thereof,the thrust on the slant; in one.

in connection with the drawing which forms.

3). The center or axis :of the boreis shown CRANKLESS MECHANISM 1931 Serial a... 531,404.

is an elevational viewof a slant shaft and slant and one of the reciprocating; units used in connection therewith, thereciprocating unit bein shownin section. r

The invention brie yhdescribed consists of the combination of ashaft having a flange carried thereby and a slant ring inclined with respect to the. shaft. axis and engaging andsecured to the opposite faces of the flange in such a manner that thegreatest thrust loads on theslant will be borne by the flange; and not by the securing means by which the slant is connected to the flange. The slant is constructed. in the form of a ring having a central.opening through which the shaft and a portion: ofthe flange can be passed, whereby-surfaces onoppositesides of the ring can be secured in engagement with the oppositefacesof the flanges Further details of the invention will In the" particular form; of;the,invention illustrated in the drawingthere is showna shaft ;having a hub 11 provided with shoulders 12 and 13 and a flange 14: extending laterally ofther shaft and hub. The flangel is disposed at right angles to the axis of the shaft- '10 iandhas sides or faces 15 and 16. and curvedends 17 i and 183111 theparticular form of the invention shown. the sideiedges 19 and20 of the flangeare; flat, butQit should be understood that the specific shape or outline of the flange 14: is: immaterial. H i

The slant ring is formed preferably in, the'followingmanner: A central opening is first bored therethrough on a suitable radius as, for instance, radius R shown in Fig. 4., i This bore ismade on the axis as, .(see Fig.

inFig. 4 at O. i 1 e. 1

1 After the boredescribed inlthepreceding paragraph hasbeen made theboring tool is shifted from the axis :10, y to a parallel axis offset laterally therefrom. A second boreis then made on. a suitableradius, such asfthe radius R in Fig.4, the center of thisbore being indicated at O. This bore forms a fiat surface 26 which is normal to the shaft axis x, p 1

. the foiin of theifiventioh shown a pair of After the surface 26 is formed a similar surface 27 is formed on the opposite face of the slant ring, this surface being formed by a bore about a center 0 on a radius R The radii It and R are shown as equal, but this is not essential. The planes of the surfaces 26 and 27 are parallel and normal to the axis 00, y and are spaced apart a distance M, N Which is equal to the Widthof the flange 14. In Fig.- {I the arcs A, B andC, D are portions of the first bore formed on the radius B.

'After the slant ring 25 has been constructy ed in the manner describedthe shaft and one end of the flange 14 are'passed through the ring and the faces 15 and 16 of the flange are positioned" in engagement with the surfaces 26 and 27. to the flange in any suitable manner and in vve'dges 30 21.11631 are placed between the shoulders 12 and 13 and the portions. A, B and (LD of the bore of the ring. Suitable securing means, such as bolts 83, are passed through'th'e Wedges and are secured'to the flange and oppositely extending bolts 34 are passed through the flange and secured to the ring.

Fig. 5 shows a slant 25 engaging slippers 35 and 36 which are carried by a bridge 37 which in turn connects oppositely acting pistons 40 and ll. Y The slant 25 is shovvn in Fig. 5 at the most acute angle with the shaft 10 and it Willbe noted that the piston 40 is located substantially in firing position in the cylinder 42. The piston41 is disposed substantially at the outer end of its stroke in the cylinder 43. When the piston 40 is lo-- cated as shown the explosion loadwill be taken by the thrust between the slant surfa e2'6 and the face 15 of the flange 14..

From the foregoing descriptionit Will be clear that the explosive or maximum loads on the slant are taken by the flange on the shaft and that the bolts or other securing means by which the slant ring is connected to the shaft are not subject to heavy loads.

Although tine specific embodiment of the invention has been particularly shown and described, it Will be understood that the inventi'on is capable of modification and that changes in the construction and in the arrangement of the various cooperating parts ax be made Without departing from the spirit or scope of the invention, as expressed in the following claims.

What I claim is:

1. In combination, a shaft having an annular flange extending therefrom and a slant inclined to the shaft and having one surface engaging one face of the flange and another surface engaging the other face ofthe flange, and means detachably securing the slant to the flange, the width of the flange being equal to the distance at all points between said slant surfaces.

The ring is then secured" 2. In combination, a shaft having an annular flange extending therefrom, and provided with oppositely disposed surfaces at substanwith oppositely disposed surfaces substantially at right angles to the shaft axis and a slant inclined to the shaft and having one plane surface engaging one face of the flange and another plane surface engaging the other face of the flange, and means detachably securing the slant to the flange.

4. In combination, a shaft having an annular flange extending therefrom, provided with oppositely disposed surfaces at substantially right angles to the shaft and a slant inclined to the shaft and to the flange and having one plane surface engaging one face of the flange, and another plane surface engaging the other faceof the flange, and means detachably securing the slant to the flange, said slant surfaces being disposed opposite the portions of the slant havingthe greatest inclination to the shaft axis.

5. In combination, a shaft having an annular flange extendingtherefrom, and a slant ring inclined to the shaft axis and detachably secured to and engaging th'e opposite faces of said flange, said ring having surfaces disposed substantially at right angles to the shaft axis to which the flange is secured.

6. In combination, a shaft having an annular flange extending therefrom, a slant rin inclined to the shaft axis and detachably secured to and engaging the opposite faces of said flange, said ring having surfaces disposed substantially at right angles to the shaft axis to Which the flange is secured, and Wedging means securing said slant ring to said flange. I

7 In combination, a shaft, an annular flange thereon and disposed at right angles thereto, a slant inclined to the shaft axis and having oppositely'facing parallel surfaces normal to the shaft axis, and means detach ably securing opposite facesof the flange in thrust relation to the surfaces of said slant.

THOMAS L. SHERMAN. 

